Omnisharp autocomplete missing a lot of valid members

[CodeSteele]

Platform

• [ ] Linux
• [X] Windows
• [ ] OSX

Type

• [X] This is an issue
• [ ] This is a feature request
• [ ] Other

Checklist

• [ ] It hasn't been fixed in the latest master
• [X] I can reproduce this issue in a fresh Sublime Text install without other extensions

Versions

output of mono --version:

6.0.0

output of msbuild /version:

16.1.85+gad9c9926a7 for Mono

(Both tried on a machine with the above two and without, the requirements says windows only)

Details

What's the bug?

Omnisharp only shows immediately available members (for base Object type and the Home Controller itself), but nothing under the Controller class, eg:

Sublime:

VSCode:

How-To

How do I reproduce this issue?

Fresh install of Omnisharp.